Thermosetting plastics have in general:

1. molecular chains that slip past one another when the material is heated sufficiently
2. high strengths and low ductilities
3. a covalently bonded 3-dimensional network or crosslinked structure
4. both (A) and (C)

Thermosetting plastics have
* High strengths
* Low ductilities
* Covalently bonded 3-dimensional network or crosslinked structure.